出典:Wikipedia
出典:『Wikipedia』 (2010/12/02 08:42 UTC 版)
The Kam Group is a 10 km (6 mi) thick Archean volcanic group in the Yellowknife greenstone belt of the Northwest Territories, Canada. It consists of tholeiitic mafic and subordinate felsic volcanic rocks that were erupted in a submarine environment about 2706 million years ago.